Furnace.



No. 660,274. Patented Oct. 23, won.

.1. MURPHY.

FURNACE.

(Applicalbion filed Mar. 13, 1900.)

3 Sheets-Sheet I.

(No Model.)

m: NORRIS vzrins co. muTuumuu WASHINGTON n c No. 660,274. Patented Oct. 23,- 1900.

J. MURPHY.

FURNACE.

(Application filed Mar. 13, 1900.)

(No Model.) 3 $haets-$heet 2.

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No. 660,274. Patented Oct. 23, I900;

MURPHY.

FURNACE;

(Lpplicltion med Mar. 18, 1900.) I (M 3 Shan -Sheet 3.

UNITED STATES FATENT @rhic'h.

JAIiIEsIvIU PI-IY, OF CHICAGO, ILLINoIs.

FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 660,274, dated October 23, 1900. Application filed March 13, 1900. Serial No. 8,448 (No model.)

To aZZ whom it may concern;

Be it known that I, JAMES MURPHY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Furnaces, of which the following is a specification. 7

My invention relates particularly to boilerfurnaces; and my object is to provide an improved fireproof construction, applicable to either new or old furnaces, whereby a more perfect distribution of air is secured and conditions for more perfect combustion attained.

In the preferred construction the furnacewalls are provided with channels which lead from the ashpit around the edges of the grate to the combustion-chamber and are in communication witheach other near their discharge-orifices. I

In the drawings, Figure 1 represents a broken vertical longitudinal section of my improved furnace, the section being taken at line 1 of Fig. 2; Fig. 2, a transverse sect-ion at line 2 of Fig. 1; Fig. 3, a horizontal section at line 3 of Fig. 1; Fig. 4, an upper perspective view of a fragment of a lower tile section employed, and Fig. 5 a similar view 0 an upper' tile-section.

A, A, and A represent, respectively, the front wall, side walls, and bridge-wall; B, the grate; B, the combustion-chamber; B the ash-pit, and B the combustion-chamberdoor openings. The ash-pit doors are directly beneath the com bustion-chamber do0rs. C 0, Figs. 4L and 5, represent a two-segtion tile, the top section of which is formed with a horizontal half-circular groove or passage a and the lower section of which is formed with a corresponding horizontal half-circular groove Ct, an intersecting vertical passage a and a discharge-orifice a When the top sec tion is placed on the lower section, a tile is formed having a vertical passage open at the lower end and crossed by the passage a a and provided with a discharge-orifice at the face adjacent to the combustion-chamber. Preferably the passages a,a,and a are nearer the outer face of the tile than the inner face, so that the thicker walls are presented toward the fire.

The preferred manner of providing the furmace-walls with the desired channels is to have or provide a space or channel 0 c c c at the inner portion of each wall, said channel running the full length of the wall Where the latter is uninterrupted, and to provide short intake-channels cl therefor, separated by refractory partitions d and in communication with the ash-pit, and then to fill the space 0 c c c with the tiles 0 C,so placed that the horizontal channels a a shall register to form one continuous passage within the wall and extending longitudinally thereof. When so placed, the tiles are supported by the partitions d and their interiors are in communication with the ash-pit through the intakes (1, while their discharge-orifices are in position to distribute air over the entire fire.

The side walls and bridge-wall may be pro- -vided throughout their length with the improved tiles. Where more than one door is provided for each the combustion-chamber and ash-pit, it is common to leave a portion of the front wall intactbetween the two sets of doors. This space is utilized in the present construction for placing one or more of the tiles 0 O, and it may here be observed that said tiles may be placed wherever there is sufficient wall to be recessed to receive them and permit them to extend above and below the grate. from the tiles in the ordinary manner.

It may be stated that the'l'urnace-walls' are commonly built of brick, and where an old furnace is to be equipped with my improvements a given number of layers of bricks may be removed from theinner surfaces of the walls to receive the tiles, and then in a lower plane the bricks may be removed at short intervals to form the channels at and tile-supporting columns 01. The tiles alford air-conduits for taking air from the ash-pit and discharging it above the grate.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a furnace, the combination with a combustion-chamber, ash-pit and grate, of. tiles set into the walls at the grate edges and provided with vertical passages and horizontal discharge-orifices, and columns beneath said grate supporting said tiles and affording air-intakes between them, substantially as and for the purpose set forth.

2. In a furnace, the combination with a The grate may be supported combustion-chamber, ashpit and grate, of one of said tile-sections being provided with tiles set into the walls at the'grate edges, each a discharge-orifice, substantially as and for comprising a top section provided on its lower the purpose set forth.

surface with a channel, a lower section hav- 7 JAMES MURPHY; 5 ing a vertical channel and at its top a chan- In presence ofnel registering. with the channel of said top D. W. LEE,

section and crossing said vertical channel, A. D. BACCI; 

